Home / 139,030.60-191,852.58-78,604.20

Finding the Fourth Proportional to 139,030.60, 191,852.58 and 78,604.20

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Solution

The fourth proportional to 139,030.60, 191,852.58 and 78,604.20 is: 108,468.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,030.60 : 191,852.58 = 78,604.20 : x
  2. Step 2: Convert to fraction form
    139,030.60/191,852.58 = 78,604.20/x
  3. Step 3: Cross multiply
    139,030.60x = 191,852.58 × 78,604.20
  4. Step 4: Simplify right side
    139,030.60x = 15,080,418,568.84
  5. Step 5: Solve for x
    x = 15,080,418,568.84/139,030.60
  6. Step 6: Final answer
    x = 108,468.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.